Have you considered the possibility of the battery not being charged?

What's the voltage output when the car is running?

Batteries DO go bad you know.

Jim, you're old enough to not believe the idiot light. Get the voltmeter out and check it out.

__________________
“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now